I really enjoyed season 2. They didn't try as hard to shoehorn everything into a connecting narrative in season 2, though they still have a pretty wild finale.
For the ongoing discussion, I'll skip Echo. I'm just not really interested, and if it's as violent as people have hinted at, I'm not watching that with my kiddo around.
If it means anything, I listened to an internet personality laugh at how "Mature" rated the show was portrayed to be in the commercials. He said it was all internet gimmick and that it was a hard PG-13 at best in reality.